fix output max height update for diff editor.

src/vs/workbench/contrib/notebook/browser/diff/notebookTextDiffEditor.ts

@@ -483,7 +483,28 @@ export class NotebookTextDiffEditor extends EditorPane implements INotebookTextD
 		}
 	}
 
-	scheduleOutputHeightAck() { }
+	scheduleOutputHeightAck(cellInfo: IDiffCellInfo, outputId: string, height: number) {
+		const diffElement = cellInfo.diffElement;
+		// const activeWebview = diffSide === DiffSide.Modified ? this._modifiedWebview : this._originalWebview;
+		let diffSide = DiffSide.Original;
+
+		if (diffElement instanceof SideBySideDiffElementViewModel) {
+			const info = CellUri.parse(cellInfo.cellUri);
+			if (!info) {
+				return;
+			}
+
+			diffSide = info.notebook.toString() === this._model?.original.resource.toString() ? DiffSide.Original : DiffSide.Modified;
+		} else {
+			diffSide = diffElement.type === 'insert' ? DiffSide.Modified : DiffSide.Original;
+		}
+
+		const webview = diffSide === DiffSide.Modified ? this._modifiedWebview : this._originalWebview;
+
+		DOM.scheduleAtNextAnimationFrame(() => {
+			webview?.ackHeight(cellInfo.cellId, outputId, height);
+		}, 10);
+	}
 
 	private _computeModifiedLCS(change: IDiffChange, originalModel: NotebookTextModel, modifiedModel: NotebookTextModel) {
 		const result: DiffElementViewModelBase[] = [];

src/vs/workbench/contrib/notebook/browser/notebookBrowser.ts

@@ -173,7 +173,7 @@ export interface ICommonNotebookEditor {
 	focusNotebookCell(cell: IGenericCellViewModel, focus: 'editor' | 'container' | 'output', options?: IFocusNotebookCellOptions): void;
 	focusNextNotebookCell(cell: IGenericCellViewModel, focus: 'editor' | 'container' | 'output'): void;
 	updateOutputHeight(cellInfo: ICommonCellInfo, output: IDisplayOutputViewModel, height: number, isInit: boolean, source?: string): void;
-	scheduleOutputHeightAck(cellId: string, outputId: string, height: number): void;
+	scheduleOutputHeightAck(cellInfo: ICommonCellInfo, outputId: string, height: number): void;
 	updateMarkdownCellHeight(cellId: string, height: number, isInit: boolean): void;
 	setMarkdownCellEditState(cellId: string, editState: CellEditState): void;
 	markdownCellDragStart(cellId: string, position: { clientY: number }): void;

src/vs/workbench/contrib/notebook/browser/notebookEditorWidget.ts

@@ -2355,12 +2355,12 @@ export class NotebookEditorWidget extends Disposable implements INotebookEditor
 		}
 	}
 
-	scheduleOutputHeightAck(cellId: string, outputId: string, height: number) {
+	scheduleOutputHeightAck(cellInfo: ICommonCellInfo, outputId: string, height: number) {
 		DOM.scheduleAtNextAnimationFrame(() => {
 			this.updateScrollHeight();
 
 			this._debug('ack height', height);
-			this._webview?.ackHeight(cellId, outputId, height);
+			this._webview?.ackHeight(cellInfo.cellId, outputId, height);
 		}, 10);
 	}
 

src/vs/workbench/contrib/notebook/browser/view/renderers/backLayerWebView.ts

@@ -874,7 +874,7 @@ var requirejs = (function() {
 								if (resolvedResult) {
 									const { cellInfo, output } = resolvedResult;
 									this.notebookEditor.updateOutputHeight(cellInfo, output, height, !!update.init, 'webview#dimension');
-									this.notebookEditor.scheduleOutputHeightAck(cellInfo.cellId, update.id, height);
+									this.notebookEditor.scheduleOutputHeightAck(cellInfo, update.id, height);
 								}
 							} else {
 								this.notebookEditor.updateMarkdownCellHeight(update.id, height, !!update.init);